Chapter 2, Problem 69P

Interpretation Introduction

Interpretation:

Among the two buffers protonated methylamine/methylamine buffer and protonated ethylamine/ethylamine buffer the buffer which is better to carry out a reaction that produces protons should be determined.

Concept Introduction:

Important formulas regarding acid-base concepts are:

$\begin{array}{l}\text{pH}\text{=}\text{-}\text{log}\left({\text{H}}^{\text{+}}\right)\\ \text{pOH}\text{=}\text{ -}\text{log}\left({}^{\text{-}}\text{OH}\right)\\ \text{pKa}\text{=}\text{ -}\text{log}\text{Ka}\\ \text{pH}\text{+}\text{pOH}\text{=}\text{ 14}\end{array}$

Henderson-Hasselbalch equation

$\text{pKa}\text{=}\text{pH}\text{+}\text{log}\frac{\left[\text{HA}\right]}{\left[{\text{A}}^{\text{-}}\right]}$